Improved varnish for pictures



UNITED STATES PATENT OFFICE.

IMJPRQVED VAR'NflSl-l FOR PICTURES;

Specification forming partof LettersPateut No. 38,690, dated May 26, 15563.

To all whom it may-concern.- Be it knowxithat I, J 0H1 MCKILLOP, of the my of Brooklyn. in the county oi: Kings and tate of New York, have invented a new and improved varnish for'lithographs, engravings, show-cards, or other pictures, impressions, or designs on paper, cardiboard, orother. materials of similar nature, and which I term the (Jhromo-Fulgent Coating and Ida hereby declare that thefollowing is a full, clear, and

exact statement of the component parts of and manner of compounding and usingthe same.

1 vTake eight-(8) ounces of. solid gelatine, add

sixty (60) ounces otcold water, and when the gel'atine has been thoroughly soaked heat and boil tilla perfect mixture is efl'e'cted. Take also the yolk and glair of five4(5) hens eggs,

add eighteen (18) ounces of cold watery-and heat smooth glass-plate of a size not less than that of the surface to be coated in snchouantity as to form a thin butperfectly even auduniform coating, and left to become so dry that a touch-ofthe finger will not indent -it. g-The card, picture, or other articleto be coatedv is then moistened with water until its surface is thoroughly damp,hut not wet, and iu this condition is spread evenly over the coating on the it is perfectly dry itcau be easily'pulled from the plate, bringingwithit the coating, which vhas a beautiful even glazed surface. W a

' The advantage which this varnish possesses over other varnishes composed in part of gelatine is that it is not afiectcd bychanges in the tcmperatureorhygrometric condition of the atmosphere. The egg has the efi'ect of making it pliable and preventiii g itl'rom crackmakeitleave the surface of the glass plate easily. k f

I propose generally to'add to the mixture about three-quarters (i ofau ounce of the extaste unpleasant. a

- The gelatiue which Iemploy is the ordinary refined white gelatine'of commerce.

I do not confinev myself t o the precise proportionsherein specified of the several ingrerially-altering its'character, and'I have merely best; but

What I claim as my invention, and desire to secure by Letters Patent, is-

veggs, potash, and watery-in about the proper.- f'tionshcrein specified. y JOHN MoKILLOP. Witnesses;

HENRY T. BROWN,

A..F. SdnLEenL,

glass plate and left to dry in a room at a temperature of from 60% at 80 Fahrenheit. When" ing. The principal .cflectof the potash is to tract of geritiau root, the object of which is to prevent it from-being eaten by persons who I may be employed to use it byrendering its dieuts of which varnish is composed,- as these may be to some extent varied withoutmate statcd those proportions which 'I consider the -.Thevarnish or coating composed of gelatine, 4 

